Quad flaps allow you to use crow mixing- the center flaps drop down and the outer ailerons pop up. Using this technique on the 40 sized version allows the pilot to point it straight down without gaining too much airspeed.

Nope not really. Spiolerons are Spoilers and Ailerons mixed. You see spoilerons on full scale passenger jets on landing. That is when the spoilers raise on one side of the wing to help in roll stability and to quickly level the wing.

Crow raises both aileron straight up and the flaps go down. It is very draggy and allows the plane to be flown straight nose down without adding significant speed.

Your radio transmitter must support "crow" or full 4 servo wing support (sailplane mixes have this) in order to do this. Sailplanes use it for spot landings (high drag = spot landing).